RankingSet.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2020 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
package org.turro.ranking;
 
import java.util.HashSet;
import java.util.List;
import org.turro.string.Strings;
import org.turro.indicator.IndicatorVariable;
import org.turro.script.Script;
import org.turro.script.StatisticsFunctions;
 
public class RankingSet extends HashSet<IRanking> {
 
  public void addMissing(List<IndicatorVariable> variables) {
    for(IndicatorVariable variable : variables) {
      if(!hasVariable(variable)) {
        add(new GenericRanking("missing", variable.getName(), variable.getMissingValue()));
      }
    }
  }
  
  public boolean hasVariable(IndicatorVariable variable) {
    return stream().anyMatch(r -> r.getConcept().equals(variable.getName()));
  }
  
  public double applyFrom(String formula) {
    if(!Strings.isBlank(formula)) {
      Script script = new Script();
      script.addMethodsFromClass(StatisticsFunctions.class);
      for(IRanking r : this) {
        script.addVariable(r.getConcept(), r.getRanking());
      }
      return script.evalToDouble(formula, 2);
    }
    return 0;
  }
 
}